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[PATCH] pci enumeration on ixp2000: overflow in kernel/resource.c

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IXP2000 (ARM-based) platforms use a separate 'struct resource' for PCI MEM
space.  Resource allocation for PCI BARs always fails because the 'root'
resource (the IXP2000 PCI MEM resource) always has the entire address space
(00000000-ffffffff) free, and find_resource() calculates the size of that
range as ffffffff-00000000+1=0, so all allocations fail because it thinks
there is no space.

(akpm: pls. double-check)

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Lennert Buytenhek 2005-04-16 15:25:58 -07:00 committed by Linus Torvalds
parent fe4b334f8b
commit b52402c783
1 changed files with 1 additions and 1 deletions
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kernel/resource.c
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@ -266,7 +266,7 @@ static int find_resource(struct resource *root, struct resource *new,
new->start = (new->start + align - 1) & ~(align - 1);
if (alignf)
alignf(alignf_data, new, size, align);
if (new->start < new->end && new->end - new->start + 1 >= size) {
if (new->start < new->end && new->end - new->start >= size - 1) {
new->end = new->start + size - 1;
return 0;
}